git.sesse.net Git - nageru/blob - mainwindow.cpp

   1 #include "mainwindow.h"
   2
   3 #include "clip_list.h"
   4 #include "disk_space_estimator.h"
   5 #include "player.h"
   6 #include "post_to_main_thread.h"
   7 #include "timebase.h"
   8 #include "ui_mainwindow.h"
   9
  10 #include <string>
  11 #include <vector>
  12
  13 #include <QMouseEvent>
  14 #include <QWheelEvent>
  15 #include <QShortcut>
  16 #include <QTimer>
  17
  18 #include <sqlite3.h>
  19
  20 using namespace std;
  21 using namespace std::placeholders;
  22
  23 MainWindow *global_mainwindow = nullptr;
  24 ClipList *cliplist_clips;
  25 PlayList *playlist_clips;
  26
  27 extern int64_t current_pts;
  28 extern mutex frame_mu;
  29 extern vector<int64_t> frames[MAX_STREAMS];
  30
  31 MainWindow::MainWindow()
  32         : ui(new Ui::MainWindow),
  33           db("futatabi.db")
  34 {
  35         global_mainwindow = this;
  36         ui->setupUi(this);
  37
  38         // The menus.
  39         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
  40
  41         global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2));
  42         disk_free_label = new QLabel(this);
  43         disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
  44         ui->menuBar->setCornerWidget(disk_free_label);
  45
  46         StateProto state = db.get_state();
  47
  48         cliplist_clips = new ClipList(state.clip_list());
  49         ui->clip_list->setModel(cliplist_clips);
  50         connect(cliplist_clips, &ClipList::any_content_changed, this, &MainWindow::content_changed);
  51
  52         playlist_clips = new PlayList(state.play_list());
  53         ui->playlist->setModel(playlist_clips);
  54         connect(playlist_clips, &PlayList::any_content_changed, this, &MainWindow::content_changed);
  55
  56         // For scrubbing in the pts columns.
  57         ui->clip_list->viewport()->installEventFilter(this);
  58         ui->playlist->viewport()->installEventFilter(this);
  59
  60         QShortcut *cue_in = new QShortcut(QKeySequence(Qt::Key_A), this);
  61         connect(cue_in, &QShortcut::activated, ui->cue_in_btn, &QPushButton::click);
  62         connect(ui->cue_in_btn, &QPushButton::clicked, this, &MainWindow::cue_in_clicked);
  63
  64         QShortcut *cue_out = new QShortcut(QKeySequence(Qt::Key_S), this);
  65         connect(cue_out, &QShortcut::activated, ui->cue_out_btn, &QPushButton::click);
  66         connect(ui->cue_out_btn, &QPushButton::clicked, this, &MainWindow::cue_out_clicked);
  67
  68         QShortcut *queue = new QShortcut(QKeySequence(Qt::Key_Q), this);
  69         connect(queue, &QShortcut::activated, ui->queue_btn, &QPushButton::click);
  70         connect(ui->queue_btn, &QPushButton::clicked, this, &MainWindow::queue_clicked);
  71
  72         QShortcut *preview = new QShortcut(QKeySequence(Qt::Key_W), this);
  73         connect(preview, &QShortcut::activated, ui->preview_btn, &QPushButton::click);
  74         connect(ui->preview_btn, &QPushButton::clicked, this, &MainWindow::preview_clicked);
  75
  76         QShortcut *play = new QShortcut(QKeySequence(Qt::Key_Space), this);
  77         connect(play, &QShortcut::activated, ui->play_btn, &QPushButton::click);
  78         connect(ui->play_btn, &QPushButton::clicked, this, &MainWindow::play_clicked);
  79
  80         QShortcut *preview_1 = new QShortcut(QKeySequence(Qt::Key_1), this);
  81         connect(preview_1, &QShortcut::activated, ui->preview_1_btn, &QPushButton::click);
  82         connect(ui->input1_display, &JPEGFrameView::clicked, ui->preview_1_btn, &QPushButton::click);
  83         connect(ui->preview_1_btn, &QPushButton::clicked, [this]{ preview_angle_clicked(0); });
  84         ui->input1_display->set_overlay("1");
  85
  86         QShortcut *preview_2 = new QShortcut(QKeySequence(Qt::Key_2), this);
  87         connect(preview_2, &QShortcut::activated, ui->preview_2_btn, &QPushButton::click);
  88         connect(ui->input2_display, &JPEGFrameView::clicked, ui->preview_2_btn, &QPushButton::click);
  89         connect(ui->preview_2_btn, &QPushButton::clicked, [this]{ preview_angle_clicked(1); });
  90         ui->input2_display->set_overlay("2");
  91
  92         QShortcut *preview_3 = new QShortcut(QKeySequence(Qt::Key_3), this);
  93         connect(preview_3, &QShortcut::activated, ui->preview_3_btn, &QPushButton::click);
  94         connect(ui->input3_display, &JPEGFrameView::clicked, ui->preview_3_btn, &QPushButton::click);
  95         connect(ui->preview_3_btn, &QPushButton::clicked, [this]{ preview_angle_clicked(2); });
  96         ui->input3_display->set_overlay("3");
  97
  98         QShortcut *preview_4 = new QShortcut(QKeySequence(Qt::Key_4), this);
  99         connect(preview_4, &QShortcut::activated, ui->preview_4_btn, &QPushButton::click);
 100         connect(ui->input4_display, &JPEGFrameView::clicked, ui->preview_4_btn, &QPushButton::click);
 101         connect(ui->preview_4_btn, &QPushButton::clicked, [this]{ preview_angle_clicked(3); });
 102         ui->input4_display->set_overlay("4");
 103
 104         connect(ui->playlist_duplicate_btn, &QPushButton::clicked, this, &MainWindow::playlist_duplicate);
 105
 106         connect(ui->playlist_remove_btn, &QPushButton::clicked, this, &MainWindow::playlist_remove);
 107         QShortcut *delete_key = new QShortcut(QKeySequence(Qt::Key_Delete), ui->playlist);
 108         connect(delete_key, &QShortcut::activated, [this] {
 109                 if (ui->playlist->hasFocus()) {
 110                         playlist_remove();
 111                 }
 112         });
 113
 114         // TODO: support drag-and-drop.
 115         connect(ui->playlist_move_up_btn, &QPushButton::clicked, [this]{ playlist_move(-1); });
 116         connect(ui->playlist_move_down_btn, &QPushButton::clicked, [this]{ playlist_move(1); });
 117
 118         connect(ui->playlist->selectionModel(), &QItemSelectionModel::selectionChanged,
 119                 this, &MainWindow::playlist_selection_changed);
 120         playlist_selection_changed();  // First time set-up.
 121
 122         preview_player = new Player(ui->preview_display, /*also_output_to_stream=*/false);
 123         live_player = new Player(ui->live_display, /*also_output_to_stream=*/true);
 124         live_player->set_done_callback([this]{
 125                 post_to_main_thread([this]{
 126                         live_player_clip_done();
 127                 });
 128         });
 129         live_player->set_progress_callback([this](double played_this_clip, double total_length) {
 130                 post_to_main_thread([this, played_this_clip, total_length] {
 131                         live_player_clip_progress(played_this_clip, total_length);
 132                 });
 133         });
 134
 135         defer_timeout = new QTimer(this);
 136         defer_timeout->setSingleShot(true);
 137         connect(defer_timeout, &QTimer::timeout, this, &MainWindow::defer_timer_expired);
 138 }
 139
 140 void MainWindow::cue_in_clicked()
 141 {
 142         if (!cliplist_clips->empty() && cliplist_clips->back()->pts_out < 0) {
 143                 cliplist_clips->mutable_back()->pts_in = current_pts;
 144                 return;
 145         }
 146         Clip clip;
 147         clip.pts_in = current_pts;
 148         cliplist_clips->add_clip(clip);
 149         playlist_selection_changed();
 150 }
 151
 152 void MainWindow::cue_out_clicked()
 153 {
 154         if (!cliplist_clips->empty()) {
 155                 cliplist_clips->mutable_back()->pts_out = current_pts;
 156                 // TODO: select the row in the clip list?
 157         }
 158 }
 159
 160 void MainWindow::queue_clicked()
 161 {
 162         if (cliplist_clips->empty()) {
 163                 return;
 164         }
 165
 166         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 167         if (!selected->hasSelection()) {
 168                 Clip clip = *cliplist_clips->back();
 169                 clip.stream_idx = 0;
 170                 if (clip.pts_out != -1) {
 171                         playlist_clips->add_clip(clip);
 172                         playlist_selection_changed();
 173                 }
 174                 return;
 175         }
 176
 177         QModelIndex index = selected->currentIndex();
 178         Clip clip = *cliplist_clips->clip(index.row());
 179         if (index.column() >= int(ClipList::Column::CAMERA_1) &&
 180             index.column() <= int(ClipList::Column::CAMERA_4)) {
 181                 clip.stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 182         } else {
 183                 clip.stream_idx = ui->preview_display->get_stream_idx();
 184         }
 185
 186         if (clip.pts_out != -1) {
 187                 playlist_clips->add_clip(clip);
 188                 playlist_selection_changed();
 189         }
 190 }
 191
 192 void MainWindow::preview_clicked()
 193 {
 194         if (cliplist_clips->empty()) return;
 195
 196         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 197         if (!selected->hasSelection()) {
 198                 preview_player->play_clip(*cliplist_clips->back(), 0);
 199                 return;
 200         }
 201
 202         QModelIndex index = selected->currentIndex();
 203         unsigned stream_idx;
 204         if (index.column() >= int(ClipList::Column::CAMERA_1) &&
 205             index.column() <= int(ClipList::Column::CAMERA_4)) {
 206                 stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 207         } else {
 208                 stream_idx = ui->preview_display->get_stream_idx();
 209         }
 210         preview_player->play_clip(*cliplist_clips->clip(index.row()), stream_idx);
 211 }
 212
 213 void MainWindow::preview_angle_clicked(unsigned stream_idx)
 214 {
 215         preview_player->override_angle(stream_idx);
 216
 217         // Change the selection if we were previewing a clip from the clip list.
 218         // (The only other thing we could be showing is a pts scrub, and if so,
 219         // that would be selected.)
 220         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 221         if (selected->hasSelection()) {
 222                 QModelIndex cell = selected->selectedIndexes()[0];
 223                 int column = int(ClipList::Column::CAMERA_1) + stream_idx;
 224                 selected->setCurrentIndex(cell.sibling(cell.row(), column), QItemSelectionModel::ClearAndSelect);
 225         }
 226 }
 227
 228 void MainWindow::playlist_duplicate()
 229 {
 230         QItemSelectionModel *selected = ui->playlist->selectionModel();
 231         if (!selected->hasSelection()) {
 232                 // Should have been grayed out, but OK.
 233                 return;
 234         }
 235         QModelIndexList rows = selected->selectedRows();
 236         int first = rows.front().row(), last = rows.back().row();
 237         playlist_clips->duplicate_clips(first, last);
 238         playlist_selection_changed();
 239 }
 240
 241 void MainWindow::playlist_remove()
 242 {
 243         QItemSelectionModel *selected = ui->playlist->selectionModel();
 244         if (!selected->hasSelection()) {
 245                 // Should have been grayed out, but OK.
 246                 return;
 247         }
 248         QModelIndexList rows = selected->selectedRows();
 249         int first = rows.front().row(), last = rows.back().row();
 250         playlist_clips->erase_clips(first, last);
 251
 252         // TODO: select the next one in the list?
 253
 254         playlist_selection_changed();
 255 }
 256
 257 void MainWindow::playlist_move(int delta)
 258 {
 259         QItemSelectionModel *selected = ui->playlist->selectionModel();
 260         if (!selected->hasSelection()) {
 261                 // Should have been grayed out, but OK.
 262                 return;
 263         }
 264
 265         QModelIndexList rows = selected->selectedRows();
 266         int first = rows.front().row(), last = rows.back().row();
 267         if ((delta == -1 && first == 0) ||
 268             (delta == 1 && size_t(last) == playlist_clips->size() - 1)) {
 269                 // Should have been grayed out, but OK.
 270                 return;
 271         }
 272
 273         playlist_clips->move_clips(first, last, delta);
 274         playlist_selection_changed();
 275 }
 276
 277 void MainWindow::defer_timer_expired()
 278 {
 279         state_changed(deferred_state);
 280 }
 281
 282 void MainWindow::content_changed()
 283 {
 284         if (defer_timeout->isActive() &&
 285             (!currently_deferring_model_changes || deferred_change_id != current_change_id)) {
 286                 // There's some deferred event waiting, but this event is unrelated.
 287                 // So it's time to short-circuit that timer and do the work it wanted to do.
 288                 defer_timeout->stop();
 289                 state_changed(deferred_state);
 290         }
 291         StateProto state;
 292         *state.mutable_clip_list() = cliplist_clips->serialize();
 293         *state.mutable_play_list() = playlist_clips->serialize();
 294         if (currently_deferring_model_changes) {
 295                 deferred_change_id = current_change_id;
 296                 deferred_state = std::move(state);
 297                 defer_timeout->start(200);
 298                 return;
 299         }
 300         state_changed(state);
 301 }
 302
 303 void MainWindow::state_changed(const StateProto &state)
 304 {
 305         db.store_state(state);
 306 }
 307
 308 void MainWindow::play_clicked()
 309 {
 310         if (playlist_clips->empty()) return;
 311
 312         QItemSelectionModel *selected = ui->playlist->selectionModel();
 313         int row;
 314         if (!selected->hasSelection()) {
 315                 row = 0;
 316         } else {
 317                 row = selected->selectedRows(0)[0].row();
 318         }
 319
 320         const Clip &clip = *playlist_clips->clip(row);
 321         live_player->play_clip(clip, clip.stream_idx);
 322         playlist_clips->set_currently_playing(row, 0.0f);
 323         playlist_selection_changed();
 324 }
 325
 326 void MainWindow::live_player_clip_done()
 327 {
 328         int row = playlist_clips->get_currently_playing();
 329         if (row != -1 && row < int(playlist_clips->size()) - 1) {
 330                 ++row;
 331                 const Clip &clip = *playlist_clips->clip(row);
 332                 live_player->play_clip(clip, clip.stream_idx);
 333                 playlist_clips->set_currently_playing(row, 0.0f);
 334         } else {
 335                 playlist_clips->set_currently_playing(-1, 0.0f);
 336                 ui->live_label->setText("Current output (paused)");
 337         }
 338 }
 339
 340 void MainWindow::live_player_clip_progress(double played_this_clip, double total_length)
 341 {
 342         playlist_clips->set_currently_playing(playlist_clips->get_currently_playing(), played_this_clip / total_length);
 343
 344         double remaining = total_length - played_this_clip;
 345         for (int row = playlist_clips->get_currently_playing() + 1; row < int(playlist_clips->size()); ++row) {
 346                 const Clip clip = *playlist_clips->clip(row);
 347                 remaining += double(clip.pts_out - clip.pts_in) / TIMEBASE / 0.5;   // FIXME: stop hardcoding speed.
 348         }
 349         int remaining_ms = lrint(remaining * 1e3);
 350
 351         int ms = remaining_ms % 1000;
 352         remaining_ms /= 1000;
 353         int s = remaining_ms % 60;
 354         remaining_ms /= 60;
 355         int m = remaining_ms;
 356
 357         char buf[256];
 358         snprintf(buf, sizeof(buf), "Current output (%d:%02d.%03d left)", m, s, ms);
 359         ui->live_label->setText(buf);
 360 }
 361
 362 void MainWindow::resizeEvent(QResizeEvent *event)
 363 {
 364         QMainWindow::resizeEvent(event);
 365
 366         // Ask for a relayout, but only after the event loop is done doing relayout
 367         // on everything else.
 368         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 369 }
 370
 371 void MainWindow::relayout()
 372 {
 373         ui->live_display->setMinimumWidth(ui->live_display->height() * 16 / 9);
 374         ui->preview_display->setMinimumWidth(ui->preview_display->height() * 16 / 9);
 375 }
 376
 377 void set_pts_in(int64_t pts, int64_t current_pts, ClipProxy &clip)
 378 {
 379         pts = std::max<int64_t>(pts, 0);
 380         if (clip->pts_out == -1) {
 381                 pts = std::min(pts, current_pts);
 382         } else {
 383                 pts = std::min(pts, clip->pts_out);
 384         }
 385         clip->pts_in = pts;
 386 }
 387
 388 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 389 {
 390         constexpr int dead_zone_pixels = 3;  // To avoid that simple clicks get misinterpreted.
 391         constexpr int scrub_sensitivity = 100;  // pts units per pixel.
 392         constexpr int wheel_sensitivity = 100;  // pts units per degree.
 393         constexpr int camera_degrees_per_pixel = 15;  // One click of most mice.
 394
 395         unsigned stream_idx = ui->preview_display->get_stream_idx();
 396
 397         if (event->type() != QEvent::Wheel) {
 398                 last_mousewheel_camera_row = -1;
 399         }
 400
 401         if (event->type() == QEvent::MouseButtonPress) {
 402                 QMouseEvent *mouse = (QMouseEvent *)event;
 403
 404                 QTableView *destination;
 405                 ScrubType type;
 406
 407                 if (watched == ui->clip_list->viewport()) {
 408                         destination = ui->clip_list;
 409                         type = SCRUBBING_CLIP_LIST;
 410                 } else if (watched == ui->playlist->viewport()) {
 411                         destination = ui->playlist;
 412                         type = SCRUBBING_PLAYLIST;
 413                 } else {
 414                         return false;
 415                 }
 416                 int column = destination->columnAt(mouse->x());
 417                 int row = destination->rowAt(mouse->y());
 418                 if (column == -1 || row == -1) return false;
 419
 420                 if (type == SCRUBBING_CLIP_LIST) {
 421                         if (ClipList::Column(column) == ClipList::Column::IN) {
 422                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_in;
 423                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 424                         } else if (ClipList::Column(column) == ClipList::Column::OUT) {
 425                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_out;
 426                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 427                         } else {
 428                                 return false;
 429                         }
 430                 } else {
 431                         if (PlayList::Column(column) == PlayList::Column::IN) {
 432                                 scrub_pts_origin = playlist_clips->clip(row)->pts_in;
 433                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 434                         } else if (PlayList::Column(column) == PlayList::Column::OUT) {
 435                                 scrub_pts_origin = playlist_clips->clip(row)->pts_out;
 436                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 437                         } else {
 438                                 return false;
 439                         }
 440                 }
 441
 442                 scrubbing = true;
 443                 scrub_row = row;
 444                 scrub_column = column;
 445                 scrub_x_origin = mouse->x();
 446                 scrub_type = type;
 447         } else if (event->type() == QEvent::MouseMove) {
 448                 if (scrubbing) {
 449                         QMouseEvent *mouse = (QMouseEvent *)event;
 450                         int offset = mouse->x() - scrub_x_origin;
 451                         int adjusted_offset;
 452                         if (offset >= dead_zone_pixels) {
 453                                 adjusted_offset = offset - dead_zone_pixels;
 454                         } else if (offset < -dead_zone_pixels) {
 455                                 adjusted_offset = offset + dead_zone_pixels;
 456                         } else {
 457                                 adjusted_offset = 0;
 458                         }
 459
 460                         int64_t pts = scrub_pts_origin + adjusted_offset * scrub_sensitivity;
 461                         currently_deferring_model_changes = true;
 462                         if (scrub_type == SCRUBBING_CLIP_LIST) {
 463                                 ClipProxy clip = cliplist_clips->mutable_clip(scrub_row);
 464                                 if (scrub_column == int(ClipList::Column::IN)) {
 465                                         current_change_id = "cliplist:in:" + to_string(scrub_row);
 466                                         set_pts_in(pts, current_pts, clip);
 467                                         preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 468                                 } else {
 469                                         current_change_id = "cliplist:out" + to_string(scrub_row);
 470                                         pts = std::max(pts, clip->pts_in);
 471                                         pts = std::min(pts, current_pts);
 472                                         clip->pts_out = pts;
 473                                         preview_single_frame(pts, stream_idx, LAST_BEFORE);
 474                                 }
 475                         } else {
 476                                 ClipProxy clip = playlist_clips->mutable_clip(scrub_row);
 477                                 if (scrub_column == int(PlayList::Column::IN)) {
 478                                         current_change_id = "playlist:in:" + to_string(scrub_row);
 479                                         set_pts_in(pts, current_pts, clip);
 480                                         preview_single_frame(pts, clip->stream_idx, FIRST_AT_OR_AFTER);
 481                                 } else {
 482                                         current_change_id = "playlist:out:" + to_string(scrub_row);
 483                                         pts = std::max(pts, clip->pts_in);
 484                                         pts = std::min(pts, current_pts);
 485                                         clip->pts_out = pts;
 486                                         preview_single_frame(pts, clip->stream_idx, LAST_BEFORE);
 487                                 }
 488                         }
 489                         currently_deferring_model_changes = false;
 490
 491                         return true;  // Don't use this mouse movement for selecting things.
 492                 }
 493         } else if (event->type() == QEvent::Wheel) {
 494                 QWheelEvent *wheel = (QWheelEvent *)event;
 495
 496                 QTableView *destination;
 497                 int in_column, out_column, camera_column;
 498                 if (watched == ui->clip_list->viewport()) {
 499                         destination = ui->clip_list;
 500                         in_column = int(ClipList::Column::IN);
 501                         out_column = int(ClipList::Column::OUT);
 502                         camera_column = -1;
 503                         last_mousewheel_camera_row = -1;
 504                 } else if (watched == ui->playlist->viewport()) {
 505                         destination = ui->playlist;
 506                         in_column = int(PlayList::Column::IN);
 507                         out_column = int(PlayList::Column::OUT);
 508                         camera_column = int(PlayList::Column::CAMERA);
 509                 } else {
 510                         last_mousewheel_camera_row = -1;
 511                         return false;
 512                 }
 513                 int column = destination->columnAt(wheel->x());
 514                 int row = destination->rowAt(wheel->y());
 515                 if (column == -1 || row == -1) return false;
 516
 517                 currently_deferring_model_changes = true;
 518                 {
 519                         current_change_id = (watched == ui->clip_list->viewport()) ? "cliplist:" : "playlist:";
 520                         ClipProxy clip = (watched == ui->clip_list->viewport()) ?
 521                                 cliplist_clips->mutable_clip(row) : playlist_clips->mutable_clip(row);
 522                         if (watched == ui->playlist->viewport()) {
 523                                 stream_idx = clip->stream_idx;
 524                         }
 525
 526                         if (column != camera_column) {
 527                                 last_mousewheel_camera_row = -1;
 528                         }
 529                         if (column == in_column) {
 530                                 current_change_id += "in:" + to_string(row);
 531                                 int64_t pts = clip->pts_in + wheel->angleDelta().y() * wheel_sensitivity;
 532                                 set_pts_in(pts, current_pts, clip);
 533                                 preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 534                         } else if (column == out_column) {
 535                                 current_change_id += "out:" + to_string(row);
 536                                 int64_t pts = clip->pts_out + wheel->angleDelta().y() * wheel_sensitivity;
 537                                 pts = std::max(pts, clip->pts_in);
 538                                 pts = std::min(pts, current_pts);
 539                                 clip->pts_out = pts;
 540                                 preview_single_frame(pts, stream_idx, LAST_BEFORE);
 541                         } else if (column == camera_column) {
 542                                 current_change_id += "camera:" + to_string(row);
 543                                 int angle_degrees = wheel->angleDelta().y();
 544                                 if (last_mousewheel_camera_row == row) {
 545                                         angle_degrees += leftover_angle_degrees;
 546                                 }
 547
 548                                 int stream_idx = clip->stream_idx + angle_degrees / camera_degrees_per_pixel;
 549                                 stream_idx = std::max(stream_idx, 0);
 550                                 stream_idx = std::min(stream_idx, NUM_CAMERAS - 1);
 551                                 clip->stream_idx = stream_idx;
 552
 553                                 last_mousewheel_camera_row = row;
 554                                 leftover_angle_degrees = angle_degrees % camera_degrees_per_pixel;
 555
 556                                 // Don't update the live view, that's rarely what the operator wants.
 557                         }
 558                 }
 559                 currently_deferring_model_changes = false;
 560         } else if (event->type() == QEvent::MouseButtonRelease) {
 561                 scrubbing = false;
 562         }
 563         return false;
 564 }
 565
 566 void MainWindow::preview_single_frame(int64_t pts, unsigned stream_idx, MainWindow::Rounding rounding)
 567 {
 568         if (rounding == LAST_BEFORE) {
 569                 lock_guard<mutex> lock(frame_mu);
 570                 if (frames[stream_idx].empty()) return;
 571                 auto it = lower_bound(frames[stream_idx].begin(), frames[stream_idx].end(), pts);
 572                 if (it != frames[stream_idx].end()) {
 573                         pts = *it;
 574                 }
 575         } else {
 576                 assert(rounding == FIRST_AT_OR_AFTER);
 577                 lock_guard<mutex> lock(frame_mu);
 578                 if (frames[stream_idx].empty()) return;
 579                 auto it = upper_bound(frames[stream_idx].begin(), frames[stream_idx].end(), pts - 1);
 580                 if (it != frames[stream_idx].end()) {
 581                         pts = *it;
 582                 }
 583         }
 584
 585         Clip fake_clip;
 586         fake_clip.pts_in = pts;
 587         fake_clip.pts_out = pts + 1;
 588         preview_player->play_clip(fake_clip, stream_idx);
 589 }
 590
 591 void MainWindow::playlist_selection_changed()
 592 {
 593         QItemSelectionModel *selected = ui->playlist->selectionModel();
 594         bool any_selected = selected->hasSelection();
 595         ui->playlist_duplicate_btn->setEnabled(any_selected);
 596         ui->playlist_remove_btn->setEnabled(any_selected);
 597         ui->playlist_move_up_btn->setEnabled(
 598                 any_selected && selected->selectedRows().front().row() > 0);
 599         ui->playlist_move_down_btn->setEnabled(
 600                 any_selected && selected->selectedRows().back().row() < int(playlist_clips->size()) - 1);
 601         ui->play_btn->setEnabled(!playlist_clips->empty());
 602 }
 603
 604 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
 605 {
 606         char time_str[256];
 607         if (estimated_seconds_left < 60.0) {
 608                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
 609         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
 610                 int s = lrintf(estimated_seconds_left);
 611                 int m = s / 60;
 612                 s %= 60;
 613                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
 614         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
 615                 int m = lrintf(estimated_seconds_left / 60.0);
 616                 snprintf(time_str, sizeof(time_str), "%dm", m);
 617         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
 618                 int m = lrintf(estimated_seconds_left / 60.0);
 619                 int h = m / 60;
 620                 m %= 60;
 621                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
 622         } else {  // More than ten hours: Xh.
 623                 int h = lrintf(estimated_seconds_left / 3600.0);
 624                 snprintf(time_str, sizeof(time_str), "%dh", h);
 625         }
 626         char buf[256];
 627         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
 628
 629         std::string label = buf;
 630
 631         post_to_main_thread([this, label]{
 632                         disk_free_label->setText(QString::fromStdString(label));
 633                         ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
 634                         });
 635 }
 636
 637 void MainWindow::exit_triggered()
 638 {
 639         close();
 640 }
 641